From: James Stewart (j_t_s_stewart@hotmail.com)
Date: Wed Aug 20 2003 - 18:03:43 GMT-3
Hi Chris
Had the same quandry once in a lab 2 years ago, went with the raw (version
1) calculations. Mind you did not get 100% in that area - so who knows.
Of course the real answer is to put the byte count so high that the
requirement is actually meet.
Putting the byte count of Q1 = 12,000, Q2 = 18,000 and Q3 = 30,000, gives
the percentages exactly, but what of the latency for the traffic.
But what the hell -this Custom queueing not Priority.
Of course this only applies if there actually that many packets in the
queue. This SDM not TDM.
If someone wants it exact, use CBWFQ or CBLLQ with a little priority, you
get real bandwidth amounts or percentages there.
HTH (Although I suspect not) Jim
----- Original Message -----
From: "Lord, Chris" <chris.lord@lorien.co.uk>
To: <ccielab@groupstudy.com>
Sent: Wednesday, August 20, 2003 9:22 PM
Subject: Custom Queue Question
Dear All,
Given my custom queue calculation below, should I configure the IOS with the
theoretical byte counts (1500, 2250, 3750), or, the rounded-up byte counts
(1500, 3000, 4000)?
Q3 has avg pkt size of 1500, ratio required 20% [ 1 ]
Q2 has avg pkt size of 1000, ratio required 30% [1.5]
Q1 has avg pkt size of 500, ration required 50% [2.5]
Q3 byte count = 1500 x 1 = 1500 no. whole pkts = 1
Q2 byte count = 1500 x 1.5 = 2250 no. whole pkts = 3
Q1 byte count = 1500 x 2.5 = 3750 no. whole pkts = 8
Q3 rounded byte count = 1500 achieved ratio = 18%
Q2 rounded byte count = 3000 achieved ratio = 35%
Q1 rounded byte count = 4000 achieved ratio = 47%
int s0/0
custom-queue-list 1
queue-list 1 protocol ip 1 list 101
queue-list 1 protocol ip 2 list 102
queue-list 1 default 3
<<<< THIS? >>>>
queue-list 1 queue 3 byte-count 1500
queue-list 1 queue 2 byte-count 2250
queue-list 1 queue 1 byte-count 3750
<<<< OR THIS? >>>>>>
queue-list 1 queue 3 byte-count 1500
queue-list 1 queue 2 byte-count 3000
queue-list 1 queue 1 byte-count 4000
PS: Can anyone confirm to me how much time you have after passing the
written test in order to obtain a lab pass without having to take the
written again?
Thanks (in advance) for your help,
Chris.
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